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Priority to JP3371476ApriorityCriticalpatent/JPS52116620A/ja
Publication of JPS52116620ApublicationCriticalpatent/JPS52116620A/ja
Publication of JPS5524557B2publicationCriticalpatent/JPS5524557B2/ja
JP3371476A1976-03-271976-03-27Method of water stopping construction of ceiling end portion of h supporting maintainenance work in method of tunnel water stopping construction
GrantedJPS52116620A
(en)